Answer:
correct me if I'm wrong
but I think is Bulimia nervosa
Answer:
it could be due to bone muscle or cartilage creating pressure or shoulder impingement syndrome where the outer edge of your shoulder blades rub against your rotator cuffs
Explanation:
Well.. Usually no...
Unless they didn't sterilize or clean the tools used for the surgery.
Which would be quite the rare occasion...
good luck!